NEW for 2025!

Exciting times at Gemmology Today as we welcomed 2025 with a brand new format! Introducing GT Podicles, a blend of podcasts and audio articles (that in some cases can be downloaded as a PDF) that will be published every month. Whether you are commuting to work, at the gym or just chilling out, with GT Podicles, you can stay informed. Check them out!

October Podicle

If you have never heard of Alexandrite or realised that the Black Prince Ruby in the British Crown Jewels is not in fact a ruby, this GT Podicle is just for you!

Hosts David and Jane focus on two gemstones; namely chrysoberyl and spinel. The first part looks at chrysoberyl highlighting its varieties, particularly the colour-changing alexandrite and the cat's eye chrysoberyl, providing information on their physical properties, geological origins, and global localities like Russia and Brazil. The second part discusses spinel, noting its historical confusion with ruby and detailing its physical characteristics, various colours, and important sources such as Myanmar and Tanzania. Both conclude with pricing comparisons, showing percentage differentials for different quality grades and comparing them to high-value alternatives like ruby and sapphire.

Listen to previous GT Podicles by clicking on the icon below!

Catawiki is an online auction platform for buying everything from vintage comic books to jewellery. Founded in 2008 by René Schoenmakers and Marco Jansen, the company has been hosting weekly online auctions since 2011. Catawiki now operates a network of over 240 experts who value, authenticate and curate objects. To visit their website, please click on their logo.

With Sole Leone Gem Academy, you can take a World Gem Foundation course, workshop, lecture or training in gemology or have your gemstones determined and your diamond tested! To visit their website, please click on their logo.

Become a Sponsor

GT Podicles will publish 26 podicles each year. If you are interested in sponsoring GT Podicles, please click here for sponsorship rates and multiple sponsorship discounts.

Advertise with us

Please click here for advertising rates. You can purchase single ads (half page or full page) or purchase multiple ads at a discounted price. All of our advertisements are hyperlinked, allowing you to reach your clients, quickly and conveniently. Let GT Podicles help you to open up new marketing possibilities for a price that will surprise you!

Back Issues of Gemmology Today

To download non-printable PDF's of previous issues of Gemmology Today, please click here